>In that calculation, longcalc uses only elementary arithmetic, as used>to be taught in schools in my day. Your proof, however, is 50%>incomprehensible to me. Though it may well be right. Longcalc found an>error in *a* printed representation of (3^349-1)/2, which you might have>difficulty with. Fx : checks : I think it has found another one.

Can anyone (or more) please provide here the last ten decimal digits (inorder) of ((3^349)-1)/2, freshly and independently calculated and notcopied from any other medium, and not using my LongCalc or VastCalc?